Spark arrester



Feb. 11, 1930. G. CARPENTER SPARK ARRESTER Filed April 1, 1924 INVENTORMM ATTORNEYS Patented Feb. 11, 1930 UNITED STATES GUY CARPENTER, OF NEWYORK, N. Y.

SPARK ARRESTER Application filed April 1,

My invention relates to the art of separating and collecting theparticles of solids in the products of combustion, in locomotiveengines, and is a further development of my previous inventions setforth and described in my application for Patent #698,185, filed Feb.16, 1924, and my application #693,186, filed Feb. 16, 192 1.

As in my former inventions the object is attained by imparting a strongcentrifugal force upon the gases as they travel from the fire box to thestack exit and providing means to separate the solids from the gases andcollect them in a collecting chamber from 5 which they may be removed.In this invention, as distinguished from my former ones, I locate myprincipal functioning elements in a more advantageous position, andconstruct a stack chamber surrounding the stack.

My invention will be easily and clearly understood by anyone skilled inthe art, by reference to the accompanying drawings, in which:

Fig. 1 shows a longitudinal sectional view of the forward end of alocomotive engine fitted out with my device, and

Fig. 2 shows a transverse sectional view taken on the line 22, in Fig.1.

Referring to the accompanying drawings, the reference numeral indicatesthe fire tubes of a locomotive engine, the numeral 11 the smoke box, thenumeral 12 the smoke stack and the numeral 13, the exhaust jet thereof.

In the smoke box 11 and between the smoke stack 12 and the forward endof the smoke box, I have formed a chamber 14 bounded by two spacedmembers 15 and 16, a base 17, and a part of the inner wall of the smokebox 11. In this chamber I have mounted an outer cylinder 18, spaced fromthe inner surface thereof, and an inner cylinder 19, and a helicallyformed member 20, the blade thereof extending from the inner surface ofthe outer cylinder to the outer surface of the inner cylinder, ismounted between the cylinders, Bafiles 21 are provided on the innersurface of the outer cylinder and openings 22 extend through the wallsof the outer cyl- 1924. Serial No. 703,391.

inder, the openings being in close proximity to their attendant baflles.Obviously there is an opening 23 in the side member 15 and an opening 24in the side member 16, these openings communicating with the spiralpassage formed between the cylinders. An opening 25 is formed in thebase 17 communicating with an exit passage 26, closed at the base of thesmoke box 11, by a door 27.

The base 17 extends rearwardly, as shown, to a point between the stack12 and the fire tubes 10, to a partition 28 which extends upwardly fromthis base separates the stack chamber 29, thus formed, from the smokebox 11. The jet 13 extends upwardly through the lower portion of thesmoke box 11, and through the base 17, and is positioned centrally belowthe open lower end of the smoke stack 12.

By this construction a passage'is formed leading from the fire tubes 10,below the smoke stack 12 (and separated therefrom) to the forward end ofthe smoke box, thence upwardly to the opening communicating with thespiral passage. through the spiral passage 1 and the opening at theother end thereof, into the stack chamber. Gases from the fire box mustpass through this long passage to their exit through the stack, andbefore reaching the stack a strong centrifugal force has been impartedto them through the action of the exhaust jet which exerts a pullingforce or suction through the spiral passage created by the helicallyformed member. This operates to throw the particles of solids, whichinvariably accompany the products of combustion, to the inner wall ofthe outer cylinder 18, where they are caught by the baffles 21 andconducted through the openings 22 in the cylinder to the collectionchamber formed between the outer surface of the outer cylinder and theinner surface of the chamber 14, and fall to the bottom thereof. A tube26 opens into the base 17, and a door 27 closes the outer end of thesaid tube. Through this tube 26 and door 27, solids which have beenseparated from the smoke may be removed.

The drawings illustrate a preferred form of construction and as I amaware, many clifferent equivalent forms may be utilized withoutdeparting from the spirit of my invention. I do not desire to be limitedin the scope of my invention except as set forth in the appended claims.

Having thus described my invention what I claim and desire to secure byLetters Patent of the United States, is:

1. A spark arrester for locomotive engines employing a fire box,comprising a smoke stack; a smoke box; a stack chamber, mountcd in thesmoke box, and enclosing the lower end of the smoke stack a cylinder, atsecond chamber adjacent the stack chamber, mounted in the forward end ofthe second chamber; a helically formed member, secured Within saidcylinder, the elements being so arranged as to cause the smoke from thefire box to pass through the smoke boxand through the cylindercontaining said helically formed mem her, before the smoke can reach thestack chamber and pass out through the smoke stack, substantially asshown and described.

2. A spark arrester for locomotive engines employing a fire box,comprising a smoke stack; a smoke box; a deflecting element mounted inthe rear of the smoke stack; a longitudinal partition below the smokestack, attached to and extending from the defiect ing element to a pointnear the forward end of the smoke box; apair of spaced, longitudinallymounted, cylinders, one within the other, above the longitudinalpartition, and positioned between the smoke stack and the forward end ofthe smoke box, said outer cylinder having openings through its wall; anda helically formed member, secured between the inner wall of the outercylinder and the outer wall of the inner cylinder, to form a spiralpassage between said cylinders.

GUY CARPENTER.

